Exploració per tema "Fractals"

Ara es mostren els items 33-52 de 72

    • Generació procedural de terrenys potencialment infinits utilitzant CUDA 

      Solé, Genís (Universitat Politècnica de Catalunya, 2017-10-23)
      Treball Final de Grau
      Accés obert
      En aquest projecte es presenta la implementació de una llibreria de caràcter general que proporciona els mecanismes bàsics tant per a la visualització com la generació sota demanda de terrenys generats amb funcions de ...

    • Geometría fractal.Una nueva herramienta para el desarrollo del diseño textil. Aplicaciones en la estampación. 

      Neves, Jorge; Neves, Manuela; Janssens, Katja (Instituto de Investigación Textil y Cooperación Industrial, 1994-01)
      Article
      Accés obert
      En este articulo se presenta el proceso completo de diseno, comenzando por un diseño creado con la percepción matemática de la Geometría Fractal y continuando con la introducción de estas imágenes en los sistemas CAD y su ...

    • High directivity modes in the koch island fractal patch antenna 

      Romeu Robert, Jordi; Borja Borau, Carmen; Blanch Boris, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The article shows that a patch antenna with fractal boundary exhibits, at a frequencies above the fundamental mode, localized modes. These modes can have broadside directive patterns. As an example of this phenomenon ...

    • Hilbert fractal curves for HTS miniaturized filters 

      Barra Bizinotto, Marilda; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2004)
      Text en actes de congrés
      Accés obert
      This work presents novel compact High Temperature Superconductor (HTS) microstrip resonators based on Hilbert fractal curves. Their miniaturization performance has been investigated, emphasizing the parameters which allow ...

    • How much can be reduced the internal FM antenna of mobiles phones? 

      Borja, C.; Anguera Pros, Jaume; Puente Baliarda, Carles; Vergés, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      The paper introduces both a new internal FM antenna for mobile phones based on the fractal Hilbert curve, and a new evaluation criterion for quantifying the quality of the signal received by the FM antenna of mobile phones. ...

    • Introducción a los fractales 

      Alonso Tamayo, Juan Carlos (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1995)
      Article
      Accés obert

    • Iterative network model to predict the behaviour of a Sierpinski fractal network [antennas] 

      Borja Borau, Carmen; Puente Baliarda, Carles; Median, Miguel Angel (Institution of Electrical Engineers, 1998-07)
      Article
      Accés obert
      A simple, fast, numerical model to predict the input parameters of a network with the topology of the Sierpinski gasket fractal shape, is introduced. The usefulness of the model is shown through comparison with experimental ...

    • La geometría fractal en el diseño textil: desarrollo de un programa computacional. 

      Palominos, Pedro Iván; González, Nayarett (Instituto de Investigación Textil y Cooperación Industrial, 1994-07)
      Article
      Accés obert
      El presente trabajo apunta a la activación del proceso de creación de nuevos diseños textiles, basados en la geometría de fractales. Desarrollando para ello un programa computacional que facilite la creación de nuevos ...

    • Linear and nonlinear analyses of EEG dynamics during non-painful somatosensory processing in chronic pain patients 

      Sitges, Carolina; Bornas, Xavier; Llabrés, Jordi; Noguera Batlle, Miquel; Montoya, Pedro (2010-08)
      Article
      Accés restringit per política de l'editorial
      The aim of our study was to characterize brain dynamics of affective modulation of somatosensory processing in chronic pain. We hypothesized that chronic pain patients will show abnormal EEG activity under negative mood ...

    • Log-periodic optical antennas 

      Pavlov, Radostin Stefanov (Universitat Politècnica de Catalunya, 2011-09-07)
      Projecte Final de Màster Oficial
      Accés obert
      English: In recent years optical antennas have been attracting very strong interest due to the unique possibilities they offer for manipulating light on a sub-wavelength scale. Most published work deals with relatively ...

    • Los fractales y su contribución al diseño de estampados textiles. 

      Hernández, F.; Palominos, Pedro Iván; Orellana, Marylin; Ochoa Vives, Manuel (Instituto de Investigación Textil y Cooperación Industrial, 1996-01)
      Article
      Accés obert
      En el presente trabajo se emplean los Conjuntos de Julia y Sistemas de Función Iterada, para explorar su aplicación en el diseño de nuevas formas orientadas al estampado textil. Para ello, se presentan una metodología y ...

    • Method of moments applied to the analysis of rough surfaces modelled by fractals 

      Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Torres Torres, Francisco (2000)
      Text en actes de congrés
      Accés obert
      The Scattering and Emissivity of rough surfaces involve solutions to non-linear differential equations. Different approaches have been used in the literature to obtain approximate solutions under some hypothesis. For example ...

    • Method of moments enhancement technique for the analysis of Sierpinski pre-fractal antennas 

      Parrón Granados, Josep; Romeu Robert, Jordi; Rius Casals, Juan Manuel; Mosig, Juan R. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-08-31)
      Article
      Accés obert
      The numerical analysis of highly iterated Sierpinski microstrip patch antennas by method of moments (MoM) involves many tiny subdomain basis functions, resulting in a very large number of unknowns. The Sierpinski ...

    • Metodologia fractal como estrategia de crecimiento urbano 

      Unibazo Carrilo, Marcelo; Suazo Peña, Bernardo (Centre de Política de Sòl i Valoracions, 2009-06)
      Text en actes de congrés
      Accés obert
      Uno de los grandes problemas del crecimiento urbano de nuestras ciudades, es la falta de núcleos o centros en zonas periféricas que sean capaces de absorber las demandas básicas de la población y que den respuesta a las ...

    • Microscopic models applied to financial markets 

      Riu Vicente, Jordi (Universitat Politècnica de Catalunya, 2015-07-01)
      Treball Final de Grau
      Accés obert
      We use the dynamical Ising model, with stochastic dynamics for the coupling, in order to try to reproduce financial markets indexes. Specifically, the coupling follows an Ornstein-Uhlenbeck process. Regarding the employed ...

    • Miniature Wideband stacked microstrip patch antenna based on the sierpinski fractal geometry 

      Romeu Robert, Jordi; Anguera Pros, Jaume; Puente Baliarda, Carles; Borja Borau, Carmen (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The main interest in the design of a miniature microstrip patch antenna (MPA) is its small size in conjunction with the well-known advantages of a MPA (cost, profile, weight). However there is a big constraint on the ...

    • Miniaturization of superconducting filters using Hilbert fractal curves 

      Barra Bizinotto, Marilda; O'Callaghan Castellà, Juan Manuel; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-09-30)
      Article
      Accés obert
      This work presents novel compact high-temperature superconductor microstrip resonators and filters based on the Hilbert space-filling fractal curve. Several Hilbert resonator configurations have been assessed by using a ...

    • Multiband properties of a fractal tree antenna generated by electrochemical deposition 

      Puente Baliarda, Carles; Claret Bonet, Josep; Romeu Robert, Jordi; López-Salvans, M Q; Pous Andrés, Rafael (Institution of Electrical Engineers, 1996-12)
      Article
      Accés obert
      Experimental results on a fractal tree-like antenna are reported. The fractal structure is generated by electrochemical deposition. The antenna presents a multiband behaviour with a denser band distribution than the ...

    • Multiband Sierpinskl fractal patch antenna 

      Borja Borau, Carmen; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The multiband behavior of the Sierpinski patch antenna is described, and a new technique to improve the multiband behavior from the point of view of the radiation patterns is introduced. The technique suppresses the effects ...

    • Multifractal analysis of the rainfall time distribution on the metropolitan area of Barcelona (Spain) 

      Rodríguez Solá, Raúl; Casas Castillo, M. del Carmen; Redaño Xipell, Ángel (2013-04-25)
      Article
      Accés obert
      In most of the studies on scale properties in the rainfall process, multifractal behavior has been investigated without taking into account the different rain generation mechanisms involved. However, it is known that rain ...